What proportion of male runners finished

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1. In a recent Des Moines marathon, 36% of the racers were female. The distribution of finishing times for the female runners was normally distributed with a mean of 280 minutes and a standard deviation of 45 minutes. For male runners, their finishing times were also normally distributed with a mean of 262 minutes and a standard deviation of 40 minutes.

a. The fastest 33% female runners finished the race in under what time?

b. What proportion of male runners finished between 4 and 5 hours?

c. Of those that finished under 4 hours, what proportion were female?

Reference no: EM132377030

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